Those two students are at home and are OK, according to health officials.

The Florida Department of Health in Duval County'sDirector, Dr. Kelli Wells told reporters that the department first became aware of a student's positive test for tuberculosis on Tuesday after being notified by the hospital where the student was hospitalized.

The department saw a second Andrew Jackson student Wednesday as part of its own investigation. That second student also tested positive for TB. Health officials said 100 students and six school staff were being blood tested.

"Because the way we determine who needs to be tested has to do with who shared space," Wells said. "The investigation involves what classes were you in? That sort of thing."

"I was coming to get tested for TB to make sure that I was clear," Andrew Jackson High school student, Markel Blue told FCN.